Dumping-scow



(No Model.) 2 Sheets-Sheet 1. J. S. ROGERS.

DUMPING SCOW. No. 391,080. 9% Patented Oct. 16, 1888.

N. Firilnwl lwmuma n her, Wzshmglon. D. C.

(No Model.) 2 Sheets-Sheet; 2/

J. 8. ROGERS.

DUMPING scow.

No. 391,080. Patented Oct. 16, 1888.

N. PETERS. Plwh-Lirflwgrnphan Washingiun. D Q

NITED STATES PATENT OFFICE.

JAMES S\VIFT ROGERS, OF ROOKPORT, MASSACHUSETTS.

DUMPING-SCOW.

SPECIFICATION forming part of Letters Patent No. 391,080, dated October16, 1888.

Application filed July 20, 1888. Serial No. 280,494. (X0 model.)

To all whom it may concern:

Be it known that 1, JAMES SWIFT ROGERS, a citizen of the United States,and a resident of Rockport, in the county of Essex and State ofMassachusetts, have invented new and useful Improvements inDumping-Scows,of which the following,taken in connection with theaccompanying drawings, is a specification.

This invention relates to improvements on the United States LettersPatent granted to me February 15, 1887, No. 357,857, for dumping-scows,and it is carried out as follows,reference being had to the accompanyingdrawings, Where Figure 1 represents a plan view of the improveddumpingscow. Fig. 2 represents a longitudinal section on the line A B,shown in Fig. 1. Fig. 3- rcpresents an enlarged cross-section on theline C D in Fig. 1, showing the floatable doors as closed; and Fig. 4represents an enlarged crosssection 0n the line E F in Fig. 1.,showingthe floatable doors as partially open.

Similar letters refer to similar parts wherever they occnr on thedifferents parts of the drawings.

In my patent aforesaid I employed windlasses with chains passing outsideof the scow and below the floatable doors for the purpose of closing thelatter and holding them in such closed positions, and in said patent Ialso em ployed yielding springs or spring-bunters arranged below thescow at or near the hinged portions of the floatable doors for thepurpose of aiding in closing said doors; but such construction, althoughpractical, is objectionable on account of such parts being arrangedoutside and below the scow-body, and are consequently not easy of accessin case of breakage.

My present improvement has for its object to obviate such objections,for which purpose I dispense with the outside chains formerly used andemploy vertically-adj ustable lockingrods operated by means ofwindlasses for the purpose of holding the floatable doors in lockedpositions. I also dispense with the yielding springs below thescow-body,and use instead thereof compressive springs arranged in asuitable manner on the sc0w-deck,and an improved connecting device fromsaid springs to the floatable doors, as will hereinafter be more fullyshown and described.

In the drawings, a is the hollow scow-body, having the longitudinalrecess a in its bottom, as shown.

a is the well for receiving the load that is to be dumped from the scow.

b b are a pair of hollow floatable doors extending the whole length ofthe scow, and hinged at I) b to opposesides of the lower longitudinaledges of the well-room a in a manner and for the purpose as fully shownand described in my aforesaid Letters Patent.

My improved device for holding the doors I) b in the closed positionshown in Figs. 1, 2, and 3 consists of a vertically-movable looking baror bolt, 0, arranged to slide up and down in a tube, 0, passing throughfrom top to bottom of the scow and suitably secured to such parts. Thesaid bar or bolt 0 is preferably made of a square or rectangularcrosssection, but may be made of any other desirable shape or formwithout dcpartingfrom the spirit of my invention. The said bar or bolt 0terminates in its lower end as a head, 0', against which the lowermeeting edges of the hinged doors b b are made to rest when said doorsare closed and the bar or bolt 0 is raised to its highest position,asshown in Figs. 2 and 3.

With my improved scow I use two of these bars or bolts-one at or neareach end of the scow, as shown in Figs. 1 and 2. The hoisting device orWindlass for raising and lowering said bars or bolts is of the sameconstruc tion as shown and described in my aforesaid Letters Patent, andconsists of bearings d d, secured to the scow-deck,in which isjournaledthe shaft or drum (2, to which is secured the ratchet-wheel d and wheeldiprovided on its periphery with a number of radial perforations orrecesses, in which a lever or handspike is to be inserted for thepurpose of turning the shaft or drum (1 while raising the looking bar orbolt 0, which latter is connected to said shaft or drum by means of acord or chain, 0 as shown in Figs. 2, 3, and 4.

To the scow-deck is pivoted at c the pawllever c,to which is hinged at ethe pawl e", in the same manner as described and shown in my aforesaidLetters Patent.

ff are the double crank shafts located in bearings on the scow-deck,which are connected to the pawl-levers c e and hinged to thereleasing-rods gg, the inner ends of which are connected to the lever h,that is pivoted at h to the scow-deck, and provided witha handle, h, asshown in the drawings,and in the same manner as shown and described inmy aforesaid Letters Patent.

i is a locking pin inserted in a perforation in the scow-deck for thepurpose of holding the lever h, its rods 9 g, and pawlsin a lockedposition in the same manner as shown and described in the patentaforesaid.

I desire to state that theprecise hoisting de vice for raising the barsor bolts 00 and the releasing device, as shown, forms no part of mypresent invention, as any other or wellknown device maybe used to equaladvantage without departing from the essence of my invention.

My improved spring actuated device for automatically aiding in closingthe doors b b is constructed as follows: On the scow-deckI secure in asuitable manner,at or near the ends of the well a, the cylinders k k, inwhich are located the respective compressive coiled springs 7c, theouter ends of which rest against the bottoms of said cylinders k k, asshown in Fig. 1.) On the free end of each spring 70' rests a perforatedplate or washer, is, through which passes loosely the screwboltZ,provided with atake-up nut,l. (Shown in Fig. 1.) To the inner end ofthe screw-bolt t is attached in a suitable manner the cord or chainm,that is guided around a sheave or pulley, n, journaled in a suitablemanner to the scow-deck, as shown in Figs. 1 and 2. 0 is a well,preferably, made of metal, passing through the top and bottom of thescow and suitably secured to said parts. In the upper part of said wellis arranged the shaftp, on which are journalcd the sheaves or rollerspp, that serve as guidesfor the ropes or chains mm.

q' is another shaft arranged at or near the bottom of the well 0, onwhich are journaled the sheaves or rollers q q for guiding the ropes orchains m m, as shown.

The lower end of each rope or chain m is connected to a link, r, that ispivoted at 1" to another link, r,the lower end of which is pivoted at rto the floatable door b, as shown in Fig.4, the object of which is topermit the floatable doors b b to swing outward to the position shown inFig. 4 when the bolts 0 0 are released, while thescow is in the act ofbeing discharged, without causing any strain on the ropes or chains m mand their springs k k", and simply causing the jointed connecting-linksr r to be straightened out, as shown in Fig. 4.

The springs 7c commence to serve as yielding resisting means as soon asthe doors b b are swung outward beyond the position shown in Fig. 4 bythe pressure of the load that is being discharged, and until the saiddoors b'b are fully opened, as shown in dotted lines in Fig. 4. As'soonas the scow has been discharged, the doors b b are automaticallyreturned to the position shown in Fig. 4 by the influence of the springsk k and their connecting ropes or i chains m m, and the further andcomplete closing movement of the said doors will beautomaticallyaccomplished by the buoyancy of the latter, after which thelocking-bolts c c are raised by the hoisting device to the positionshown in Figs. 2 and 3.

The links 7' r are automatically doubled up between recesses in the topportions of the doors b b and the under side of the scow as the doorsare being swung from the position shown in Fig. 4. to that shown in Fig.3. By this arrangement ofjointed connecting-links attached to the lowerends ofthe spring-pressed ropes or chains m m all unnecessary strain onsaid ropes or chains and their springs is obviated, the doors b b willbe caused to open freely as soon as the bolts 0 0 are released and theload discharged, and after the discharge is-rnade the doors will beautomatically returned to the closed position shown in Figs. 1, 2, and3, first by the influence of the springs k k and their connections tothe said doors, and finally'by the buoyancy of the latter, as above setforth.

If so desired, the ropes or chains m m may be connected directly to thedoors b b without the medium of the links 1" r; but-I prefer in practiceto use the latter, combined with said ropes or chains, for the purposespecified.

The tension on the ropes or chains mm and the pressure of the springs Itmay be adjusted by the turning of the regulating-nuts l lwithin the openends of the cylinders 70, as shown in i Fig. 1.

Having thus fully described the nature, construction, and operation ofmy invention, I

wish to secure by Letters Patent, andclaim- 1. The hollow scow a and itshinged doors b b, combined with the vertically-movable locking-bolts cc", and the pipes or hollow guides c 0, extending from top to bottom ofsaid scow and adapted to serve as guides for the said locking-bolts,substantially as set forth.

2. The scow a and its hinged doors b b, in combination with thevertically-movable locking-bolts 0 c", and hoisting devices, asdescribed, for raising said bolts whenthe doors are to be locked,substantially as set forth.

3. The scow a and its hinged doors bb and the vertically-movablelocking-bolts c c,

adapted to hold the-said doors in a locked position, in combination witha pair of hoisting devices, a pair of ratchet-andpawl-releasing devices,a single lever, h, and connecting mechanism from the latter to thereleasing devices, substantially as and for the purpose set forth.

4.. The scow (1, having the hinged doorsbb,

and the spring-pressed ropes or chains m m, connected to said doorsinside of the scow,

substantially as and for the purpose set forth. 5. The scow at, havingthe hinged doors b b, and the spring-pressed ropes or chains m m,combined with the jointed links 1" 1", connected to the said doors andto chains or ropes, substantially as and for the purpose set forth.

6. The scow a and its hinged doors bb, combined with the springs 7c is,the ropes or chains m m, a guide device for the latter, and the jointedlinks r 1', connected to said doors and to said ropes or chains,substantially as and 5 for the purpose set forth.

7. The soow a and its hinged doorsbb, havingjointed to them the links 9'1", and the ropes or chains m m, attached to said links, and thecompressionsprings k k, arranged IO within the cases It and having meansfor adjusting the tension of said springs, substantially as and for thepurpose set forth.

8. A dumping-scow, a, having the floatable doors I) b, hinged toopposite sides of its hot to said doors arranged within the scow-bodyand between its ends, substantially as and for the purpose set forth.

9. A dumping-scow, at, having the floatable v doors I) b, hinged toopposite sides of its bot- 20 tom, combined with an automaticspring-closing device connected to said doors arranged within thescow-body and between its ends, substantially as and for the purpose setforth.

In testimony whereofI have signed my name 25 to this specification, inthe presence oftwo subscribing witnesses, on this 6th day of July, A.

JAMES SWIFT ROGERS.

\Vitnesses:

ALFRED PARSONS, GILBERT T. MARensoN.

